Homoepitaxial Diamond Growth by Plasma-Enhanced Chemical Vapor Deposition

Tokuda, Norio

doi:10.1007/978-3-030-12469-4_1

Cited by 6 publications

(6 citation statements)

References 167 publications

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“…The two orders of magnitude difference between the hillock densities in doped and undoped samples suggests that nitrogen adatoms may be providing additional sites for hillock nucleation. The hillock density of the undoped sample is roughly equal to the density of dislocations reported by Tokuda et al, 28 and suggests that for undoped diamond growth, the primary source for hillock nucleation is pre-existing dislocations, aligning with the findings of Ref. 27 .…”

supporting

confidence: 86%

“…Furthermore, the formation of certain defects, particularly the laterally extended, flat types of growth called hillocks, occurs via a stepedge dependent mechanism. 27,28 These defects can both serve as a probe of the growth mode and an intriguing means of locally controlling defect density.…”

mentioning

confidence: 99%

“…Once a hillock begins nucleating, it will continue growing and will stabilize unless an incoming step suppresses it. The time required for the hillock to reach the point of stability is defined as T H , 28 and the probability of any given hillock successfully nucleating will be given by,…”

mentioning

confidence: 99%

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Engineering quantum-coherent defects: the role of substrate miscut in chemical vapor deposition diamond growth

Meynell,

McLellan,

Hughes

et al. 2020

Preprint

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The engineering of defects in diamond, particularly nitrogen-vacancy (NV) centers, is important for many applications in quantum science. A materials science approach based on chemical vapor deposition (CVD) growth of diamond and in-situ nitrogen doping is a promising path toward tuning and optimizing the desired properties of the embedded defects. Herein, with the coherence of the embedded defects in mind, we explore the effects of substrate miscut on the diamond growth rate, nitrogen density, and hillock defect density, and we report an optimal angle range between 0.66 • < θ < 1.16 • for the purposes of engineering coherent ensembles of NV centers in diamond. We provide a model that quantitatively describes hillock nucleation in the step-flow regime of CVD growth, shedding insight on the physics of hillock formation. We also report significantly enhanced incorporation of nitrogen at hillock defects, opening the possibility for templating hillock-defect-localized NV center ensembles for quantum applications.

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supporting

confidence: 86%

mentioning

confidence: 99%

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Engineering quantum-coherent defects: the role of substrate miscut in chemical vapor deposition diamond growth

Meynell,

McLellan,

Hughes

et al. 2020

Preprint

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“…When the methane concentration reached 6%, smooth growth surface was achieved. With further increases of methane concentration, overlapping "hills" can be observed, the growth mechanism changed to island growth, which means that the crystal quality was decreased [31]. Figure 4 shows the effect of methane concentration on the surface morphology of the deposited diamond films.…”

Section: Characterization Of Diamond Filmsmentioning

confidence: 99%

Single Crystal Diamond Deposited by Dual Radio-Frequency Plasma Jet CVD with High Growth Rate

Líu

et al. 2019

Crystals

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Single crystal diamonds were deposited on high pressure high temperature (HPHT) substrate with high growth rate, up to 18.5 μm/h, by using dual radio-frequency inductive coupled plasma jet. The methane flux was found to influence the growth rate of single crystal diamond. The reason for this might be ascribed to the electron temperature increase, raising the flux of methane, based on the plasma diagnosis results by optical emission spectra (OES). The results of Raman spectroscopy and the X-ray rocking-curve indicated that as-deposited diamonds are of good quality.

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“…Gelatin is hydrolyzed from collagen, which is a protein obtained from connective tissues such as animal skin and bones [5,6]. Furthermore, gelatin prepared from fish skin proteins has functional properties, such as its biocompatibility, film-forming ability, and biodegradability, which promotes its application in packaging, medicine, and biomedicine [7][8][9]. Gelatin-based edible films have uniform transparency and excellent barrier performance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Sealing and Storage on Mechanical and Barrier Properties of Maillard Modified Fish Skin Gelatin/L-arabinose Composite Films

et al. 2022

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The increasing accumulation of non-degradable plastic food packaging is a global concern. In this study, we aimed to optimize the heat-sealing process of fish skin gelatin/L-arabinose (FG-Ara) composite films modified by the Maillard reaction. The effects of storage temperature, humidity, and time on the mechanical and barrier properties of the modified FG-Ara composite films were investigated. The optimal heat-sealing parameters were 24 V, with vacuum, heat-sealing, and cooling times of 7.0, 3.0, and 3.0 s, respectively. After 120 days of storage at low temperatures (4, −17 °C), the tensile strength of the composite films decreased to 11.15 ± 1.64 and 13.14 ± 1.68 MPa, respectively, and the elongation at break increased by 39.07% and 18.29% compared with the initial value, respectively. Moreover, the water vapor permeability in the low-temperature treatment groups remained relatively stable at the initial stages of storage (0–40 days) and reached 39.57 ± 3.09 and 26.95 ± 18.50 g·mm/m2·d·kPa after 120 days, respectively. The milk powder packed in the FG-Ara composite films had good quality and no hardening in low-temperature environments. After 120 days of storage, the peroxide value of the soybean oil packed in the films still met the quality standard of first-grade soybean oil. Furthermore, the Arrhenius equation was used to fit the peroxide values of soybean oil at different temperatures. The maximum shelf life of soybean oil coated by the composite film was predicted to be 250 days. The experimental results demonstrated that the optimized films might serve as effective food packaging materials.

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Homoepitaxial Diamond Growth by Plasma-Enhanced Chemical Vapor Deposition

Cited by 6 publications

References 167 publications

Engineering quantum-coherent defects: the role of substrate miscut in chemical vapor deposition diamond growth

Engineering quantum-coherent defects: the role of substrate miscut in chemical vapor deposition diamond growth

Single Crystal Diamond Deposited by Dual Radio-Frequency Plasma Jet CVD with High Growth Rate

Effect of Heat Sealing and Storage on Mechanical and Barrier Properties of Maillard Modified Fish Skin Gelatin/L-arabinose Composite Films

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